ReutersEx-AT&T CEO to become chairman of restructured GMReutersDETROIT (Reuters) - General Motors Corp said on Tuesday that former chairman and chief executive of AT&T Inc Edward Whitacre will become chairman of the restructured automaker later this summer.Former AT&T Chief to Be GM's New Chairman New York TimesEdward E. Whitacre ForbesThe Detroit News - Los Angeles Times - MSN Money - Financial Postall 257 news articles